2019 Trek Madone SLR Frameset vs 2021 Specialized Aethos
The 52 is the Specialized Aethos size closest to your 50 Trek Madone SLR Frameset. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Specialized Aethos
Compared with the Trek Madone SLR Frameset in 50, the Specialized Aethos in 52 places the top of the head tube 6 mm higher and about as far forward, relative to the bottom bracket.
- Frame stack
- +6 mm
- Higher front end
- Frame reach
- +2 mm
- About the same reach
- Wheelbase
- +1 mm
- About the same
- Head angle
- +0.4°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Madone SLR Frameset numbers we have for size 50 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Madone SLR Frameset 50 | Specialized Aethos 52 | Difference |
|---|---|---|---|
| Reach | 378 | 380mm | +2 mm |
| Stack | 521 | 527mm | +6 mm |
| Head tube angle | 72.1° | 72.5° | +0.4° |
| Effective top tube | 521 | not listed | |
| Chainstay length | 410 | 410mm | ±0 mm |
| Wheelbase | 974 | 975mm | +1 mm |
| BB drop | 72 | 74mm | +2 mm |
| Standover | 711 | 728mm | +17 mm |
| Seat tube length | 453 | 462mm | +9 mm |
| Head tube length | 111 | 120mm | +9 mm |
| Seat tube angle | not listed | 74° | |
| BB height | not listed | 266mm | |
| Fork length | not listed | 369mm |
Differences are the Specialized Aethos minus the Trek Madone SLR Frameset. Full charts: 2019 Trek Madone SLR Frameset, 2021 Specialized Aethos.
Where each sits in its class
Trek Madone SLR FramesetSpecialized Aethos
Each bike is ranked against the other road bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Trek Madone SLR FramesetSLR Frameset | Specialized AethosAethos Frameset |
|---|---|---|
| Frame | Trek OCLV | Specialized Aethos FACT |
| Fork | Trek Madone KVF | not listed |
| Derailleur | Trek derailleurs must have | not listed |
| Bottom bracket | Trek BB90 | not listed |
| Headset | Trek Madone | not listed |
| Seatpost | not listed | Roval Alpinist |
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